Table 3. Performance of the finisher pigs reared on varying planes of nutrition during the grow-finish period.
| Item | High plane (HP)1),2) | Medium plane (MP)1),3) | Low plane 1 (LP1)1),4) | Low plane 2 (LP2)1),5) | SEM | Contrast | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| B | G | B | G | B | G | B | G | LP:HP | LP:MP | LP1:LP2 | B:G | ||
| Phase I | |||||||||||||
| Initial Wt (kg) | 71.9 ± 1.4 | 69.8 ± 1.4 | 71.3 ± 1.3 | 70.2 ± 1.4 | 74.1 ± 1.4 | 72.0 ± 1.3 | 75.2 ± 1.5 | 73.2 ± 1.3 | - | 0.05 | 0.05 | 0.45 | 0.10 |
| Days on feed | 25 | 25 | 25 | 25 | 23 | 23 | 22 | 22 | - | - | - | - | - |
| Final Wt (kg) | 97.9 ± 1.9 | 94.2 ± 1.8 | 98.4 ± 1.8 | 91.6 ± 1.7 | 95.2 ± 1.7 | 91.9 ± 1.5 | 97.1 ± 2.0 | 92.9 ± 1.7 | - | 0.24 | 0.60 | 0.40 | < 0.01 |
| ADG (g) | 1,040 ± 30 | 974 ± 29 | 1,084 ± 28 | 934 ± 28 | 914 ± 30 | 863 ± 28 | 993 ± 31 | 897 ± 27 | - | < 0.01 | < 0.01 | 0.08 | < 0.01 |
| ADFI (kg) | 3.25 | 3.04 | 3.13 | 2.72 | 3.21 | 2.78 | 3.21 | 2.65 | 0.10 | 0.06 | 0.68 | 0.52 | < 0.01 |
| Gain:feed | 0.321 | 0.321 | 0.346 | 0.343 | 0.285 | 0.311 | 0.309 | 0.339 | 0.008 | 0.20 | < 0.01 | 0.01 | 0.05 |
| Phase II | |||||||||||||
| Days on feed | 18.6 ± 1.2 | 21.9 ± 1.1 | 17.5 ± 1.1 | 19.7 ± 1.0 | 20.4 ± 1.3 | 22.4 ± 1.2 | 21.8 ± 1.2 | 24.3 ± 1.1 | - | 0.10 | < 0.01 | 0.22 | 0.02 |
| Final Wt (kg) | 118.0 ± 1.0 | 114.4 ± 1.0 | 116.7 ± 0.9 | 110.0 ± 0.9 | 115.5 ± 1.0 | 111.5 ± 0.9 | 118.2 ± 1.1 | 115.9 ± 0.9 | - | 0.29 | 0.04 | < 0.01 | < 0.01 |
| ADG (g) | 1,087 ± 31 | 924 ± 30 | 1,020 ± 29 | 944 ± 28 | 1,030 ± 31 | 899 ± 29 | 983 ± 33 | 932 ± 29 | - | 0.11 | 0.42 | 0.81 | < 0.01 |
| Days to 115 kg6) | 165.0 ± 1.7 | 171.8 ± 1.6 | 168.1 ± 1.5 | 177.6 ± 1.5 | 173.3 ± 1.6 | 179.4 ± 1.5 | 170.6 ± 1.7 | 176.4 ± 1.5 | - | < 0.01 | 0.12 | 0.05 | < 0.01 |
| ADFI (kg) | 3.20 | 2.81 | 3.41 | 2.76 | 2.95 | 2.62 | 3.26 | 2.80 | 0.14 | 0.45 | 0.19 | 0.12 | < 0.01 |
| Gain:feed | 0.342 | 0.330 | 0.300 | 0.342 | 0.350 | 0.343 | 0.302 | 0.333 | 0.014 | 0.76 | 0.39 | 0.06 | 0.20 |
| Carcass characteristics7) | |||||||||||||
| Live Wt (kg) | 117.5 ± 1.3 | 115.1 ± 1.3 | 117.3 ± 1.2 | 113.6 ± 1.3 | 116.2 ± 1.3 | 112.3 ± 1.2 | 117.6 ± 1.3 | 116.8 ± 1.2 | - | 0.62 | 0.78 | 0.02 | < 0.01 |
| Carcass Wt (kg) | 88.7 ± 1.1 | 86.9 ± 1.1 | 88.5 ± 1.0 | 85.0 ± 1.1 | 87.6 ± 1.1 | 84.8 ± 1.0 | 89.2 ± 1.1 | 88.6 ± 1.0 | - | 0.77 | 0.39 | 0.01 | < 0.01 |
| Dressing (%) | 75.5 ± 0.3 | 75.5 ± 0.3 | 75.4 ± 0.3 | 74.9 ± 0.3 | 75.4 ± 0.3 | 75.5 ± 0.3 | 75.9 ± 0.3 | 75.8 ± 0.3 | - | 0.63 | 0.04 | 0.14 | 0.51 |
| Backfat thickness (mm) | |||||||||||||
| Measurement | 23.6 ± 0.8 | 19.8 ± 0.8 | 24.3 ± 0.7 | 19.8 ± 0.8 | 24.7 ± 0.8 | 20.5 ± 0.7 | 25.6 ± 0.8 | 21.6 ± 0.7 | - | 0.04 | 0.11 | 0.17 | < 0.01 |
| At 115 kg8) | 22.9 ± 0.7 | 19.8 ± 0.7 | 23.7 ± 0.7 | 20.1 ± 0.7 | 24.4 ± 0.7 | 21.0 ± 0.7 | 24.9 ± 0.7 | 21.2 ± 0.7 | - | 0.01 | 0.09 | 0.54 | < 0.01 |
Nutritional composition of each diet is shown in Table 1. Data are least squares means (LSM) or LSM ± SEM of two replicates of 13 to 17 pigs, except for the variables of the carcass characteristics.
Fed the HP grower phases I and II and HP finisher diets during the grower phases I and II and the entire finisher phase, respectively.
Fed the MP grower phases I and II and MP1 finisher diets during the grower phases I and II and the entire finisher phase, respectively.
Fed the LP grower phases I and II and MP2 finisher diets during the grower phases I and II and the entire finisher phase, respectively.
Fed the LP grower phases I and II diets and the MP1 and LP finisher diets sequentially.
Estimated from the final weight and ADG.
Data are LSM ± SEM of 25 to 29 animals. Pigs weighing 102 kg or less at the end of the feeding trial were not slaughtered.
Corrected for the indicated live weight.
B, barrow; G, gilt; SEM, standard error of mean; Wt, weight; ADG, average daily gain; ADFI, average daily feed intake.